1995 xantia fuel filter housing

tonupteabag · Post by **tonupteabag** » 17 Apr 2010, 14:55

on the fuel filter housing there is what appears to be a pressure type valve as you look under the bonnet at the filter housing its on the left hand side near where the fuel pipe feeds the filter housing its white and is only accessible with the housing off what the hell is it for as mine developed a tendency to leak i've managed to fix it but what is it for???

spider · Post by **spider** » 17 Apr 2010, 15:39

I could be wrong here not having one (actually I've never owned a car that's had this filter type, shocking I know) , its the wax stat control for the fuel heater (how much warmth to allow) as the whole unit is effectively heated as its sat on top of the thermostat housing.

Could be wrong, sorry...

tonupteabag · Post by **tonupteabag** » 17 Apr 2010, 15:51

hi andy
its above the fast idle control its actually fitted in the fuel filter housing if you remove the filter housing its situated on the fuel feed side

spider · Post by **spider** » 17 Apr 2010, 17:44

I know what you meant

Its a white screw type thing in the side of the housing.

(I did not mean the wax stat fast idle if it has one)

I'm sure its to keep fuel out of the lower end of the fuel chamber above a certain temperature (as derv only needs heating a bit really, although I do not think it would be able to get it too hot anyway, my home made heater does not)

tonupteabag · Post by **tonupteabag** » 17 Apr 2010, 19:12

ahhh right i get what you mean its was just starting to leak and i wasn't sure if it could be removed but as i have managed to effect a decent repair (i hope) the o'ring had gone hard on the outer end of the valve so i have replaced that and luckily it hasn't leaked since so hopefully its ok

mark21td · Post by **mark21td** » 17 Apr 2010, 21:46

spider wrote:I could be wrong here not having one (actually I've never owned a car that's had this filter type, shocking I know) , its the wax stat control for the fuel heater (how much warmth to allow) as the whole unit is effectively heated as its sat on top of the thermostat housing.

Could be wrong, sorry...

You're quite right, it's the fuel heater stat, oftern blocked off by the veg boys so the fuel is prmenantly going through the heater.